Lip laying device



Dec. 21', 1937. G. A. MINER LIP LAYING DEVICE Filed July 20, 1936 Patented Dec. 21, 1937 UNITED STATES 2,102,7sr LIP LAYING DEVICE George A.

United Miner, Goffstown, N. H., assignor to Shoe Machinery Corporation, Paterson, N. J., a corporationof New Jersey Application July 20, 1936, Serial No. 91,465

3 Claims.

This invention relates to lip-laying devices and is herein disclosed as embodied in a rotary tool suitable for use in laying channel lips formed on the outsoles of shoes.

It is important in closing channels to apply pressure across the entire width of the lip to insure permanent adhesion of the cement with which the inner surface of the lip and the base of the channel have been coated. It often hap pens that shoe bottoms, particularly at the shank portion, have a pronounced convex curvature,

rendering it difficult for a lip-laying tool to engage the entire width of the lip simultaneously inasmuch as the contact between the tool and the lip is tangential. This engagement is even more limited in cases where the exterior surface of a rotary tool is employed. It is therefore necessary in many cases to present the shoe two or three or even more times to the tool, each time feeding the shoe by hand progressively from one end of the channel to the other and in each successive operation applying the pressure of the tool a little nearer to the margin of the lip.

It is an object of the present invention to provide an improved device of the character under consideration which enables the entire width of a channel lip to be pressed down in a single operation.

In accordance with a feature of the invention there is provided a hollow rotary drum having a smooth, rounded, annular rim for wiping down a lip formed on a sole, the space within the rim being open to accommodate the shoe as the latter is manipulated. When a shoe having a convex shank is presented to this tool the shoe is held with its long axis approximately parallel to the axis of the tool. The circumference of the rim is such as to enable the rim to conform closely to the curvature of the shank, at least over a length which is greater than the width of the lip. When operating upon flatter portions of the shoe, the shoe may be held at more or loss of an angle to the axis of the tool and the outer portion of the rim may be utilized. To improve the frictional characteristics of the rim, inserts of rubber. may be embedded in it, preferably at an inclination to their direction of travel.

The invention further includes various features of construction and combinations of parts herein disclosed and claimed, the advantages of which will be apparent to those skilled in the art from the accompanying description, reference being had to the accompanying drawing, in which Fig. 1 is a view in side elevation of the improved lip-laying machine;

Fig. 2 is an enlarged sectional view in side elevation showing the improved device in operation upon a shoe; and

Fig. 3 is a view in front elevation of a portion of the device in operation upon a shoe.

The supporting structure of the machine as shown in Fig. 1 consists of a frame H] having bearings I 2 for a shaft M which may be driven by a pulley it over which travels a belt l8 connected to any suitable source of power. Mounted coaxially upon the end of the shaft it is a disk 29 having a socket 22 which receives the end of the shaft. Secured coaxially upon the disk 26 is a drum 24 having a smooth continuous cylindrical wall and having its outer end open. Secured upon the outer end portion of the cylindrical wall of the drum 24 is a smooth substantially continuous annular metal rim 26. This rim, as best shown in Fig. 2, has a cylindrical inner surface 28 and a plane end surface 351, Which surfaces meet in a blunt rounded edge 32. The periphery of the rim 26 extends outside of the drum 24, and is rounded off as indicated by the numeral 34. The internal diameter of the rim 26 is preferably of the order of thirteen inches, more or less. Formed in the rim 26 are a plurality of slots 36 in which are inserts of rubber 38. The slots 36 are inclined to their circumferential path of travel. The slots may be formed by a saw, and their inclination in the illustrated tool is thirty degree to the straight elements of the cylindrical surface 28. For convenience this obliquity is ignored in the sectional showing of Figs. 1 and 2. The rubber 38 may readily be inserted in the slots 36 by stretching strips of rubber, inserting them in the slots while stretched, then releasing the tension on the rubber, and trimming off the surplus material.

In operating the device a shoe S, on the sole of which is formed a channel lip L, is presented with the rim 26 in engagement with the lip L and is fed by hand progressively along the length of the lip, turning the shoe as required by the curvature of its outline. In operating upon the flatter portions of the shoe the latter may be held in the position indicated in Fig. 2, utilizing the plane surface 30. In the shank portion, however, which is often sharply convex the shoe is held in the position shown in Fig. 3, either pointing into the drum 24 or pointing out of the drum, and utilizing the cylindrical surface 28. In operating upon shoes having highly arched shanks, the rounded edge 32 may be relied upon to reach those portions of the lip which might not be accessible to a flat or a cylindrical Working surface. It has been found that the frictional effect of the rubber inserts 38 facilitates the laying of the lip by the smooth rim 26.

Having thus described my invention, what I claim as new and desire to secure by Leters Patent of the United States is:

1. A lip-laying device comprising a hollow rotary member having an open end which is surrounded by a smooth annular rim, and a plurality of strips of a soft smooth material embedded in said rim for frictionally engaging a lip formed on a sole to assist the rim in wiping down the lip.

2. A lip-laying device comprising a smooth annular rim having an interior surface which is cylindrical and an end surface which is plane, said interior and end surfaces meeting in a blunt which the drum is coaxially mounted, means for 10 driving said shaft, said rim having a plurality of slots which are inclined to their circumferential path of travel, and a strip of rubber insered in each of said slots for frictionally engaging the channel lip to assist the rim in wiping down 15 the lip.

GEORGE A. MINER. 

